The UDK Website now offers downloads of the July 2012 beta of the Unreal Development Kit, an update to this free SDK that supports the creation of commercial and non-commercial Unreal Engine 3 projects. This announcement has details on how this adds Perforce Software's Version Management system. Here's word on that: "The addition of Perforce’s industry-leading solution enables UDK developers to utilize enterprise-grade version control tools for up to 20 users and 20 workstations at no charge, with no restrictions on time limit or file quantity. In addition, the latest enhancements to Epic’s engine make it even more seamless to leverage Perforce for the game production pipeline."